CN216162494U - Slot wedge structure, stator and motor suitable for concentrated winding motor - Google Patents
Slot wedge structure, stator and motor suitable for concentrated winding motor Download PDFInfo
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- CN216162494U CN216162494U CN202122100550.9U CN202122100550U CN216162494U CN 216162494 U CN216162494 U CN 216162494U CN 202122100550 U CN202122100550 U CN 202122100550U CN 216162494 U CN216162494 U CN 216162494U
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Abstract
The utility model provides a slot wedge structure, a stator and a motor suitable for a concentrated winding motor, which comprise a slot wedge body and a comb tooth part, wherein the comb tooth part is connected with the slot wedge body and is arranged at one end of the slot wedge body; the comb tooth part is arranged along the direction that the slot wedge body is inserted into the slot of the stator core, the comb tooth part is arranged to be provided with a plurality of accommodating intervals and used for placing the overlines of the windings of the phases of the end part, the comb tooth part is matched with the windings of the end part to maintain the positions of the overlines of the windings of the phases of the end part, and the distance between the overlines of the windings of the phases of the end part is maintained. The utility model has the advantages that the comb tooth part is provided with a plurality of accommodating intervals, the comb tooth part corresponds to the overlines of the windings of each phase at the end part, the overlines of the windings of each phase are placed in the accommodating intervals of the comb tooth part, the overlines are separated, the positions of the overlines are maintained, the intervals among the overlines of the windings of each phase at the end part are maintained, the overlines at the end part are uniformly radiated, the interphase insulation performance of the windings of each phase is improved, and the use reliability of a product is improved.
Description
Technical Field
The utility model belongs to the technical field of motors, and particularly relates to a slot wedge structure suitable for a concentrated winding motor, a stator and a motor.
Background
In recent years, core technologies of new energy automobiles are rapidly developed, requirements of related indexes are higher and higher with the increase of requirements of various aspects, and a motor serving as one of core parts of the motor is developed in the directions of high slot filling rate, high rotating speed and high voltage, so that how to process winding end part interphase insulation in a limited space becomes more and more important.
Similarly, for a concentrated winding motor, how to adapt to a higher voltage platform on the premise of keeping the advantage of short end distance also becomes a difficult point to be solved urgently.
Disclosure of Invention
In view of the above problems, the present invention provides a slot wedge structure, a stator and a motor suitable for a concentrated winding motor, so as to solve the above or other former problems in the prior art.
In order to solve the technical problems, the utility model adopts the technical scheme that: a slot wedge structure suitable for a concentrated winding motor comprises a slot wedge body and a comb tooth part, wherein the comb tooth part is connected with the slot wedge body and is arranged at one end of the slot wedge body;
the comb tooth part is arranged along the direction that the slot wedge body is inserted into the slot of the stator core, the comb tooth part is arranged to be provided with a plurality of accommodating intervals and used for placing the overlines of the windings of the phases of the end part, the comb tooth part is matched with the windings of the end part to maintain the positions of the overlines of the windings of the phases of the end part, and the distance between the overlines of the windings of the phases of the end part is maintained.
Furthermore, the comb tooth part is provided with a plurality of spacing pieces, the spacing pieces are sequentially arranged along the radial direction of the stator core, a gap is formed between every two adjacent spacing pieces to form an accommodating interval, and the plurality of overlines are separated and the interval between the overlines of the winding of each phase at the end part is kept.
Further, the spacer is formed by extending one end of the wedge body outward along the length direction of the wedge body.
Further, the plurality of spacers are uniformly arranged.
Further, the spacer has a cylindrical structure.
Further, the slot wedge body comprises a slot opening part and a slot inner part, the slot inner part is arranged on one side surface of the slot opening part, and the slot inner part and the slot opening part are arranged in an intersecting manner; and
the comb tooth portion is arranged at one end of the inside of the groove, the distance from the free end portion of the comb tooth portion to the end portion, corresponding to the groove opening portion, of the groove wedge body in the length direction is larger than or equal to zero, and part or all of the comb tooth portion projects on the groove opening portion, or all of the comb tooth portion does not project on the groove opening portion.
Furthermore, a set of two opposite sides of the notch portion are respectively located at two sides of the inside of the slot, and the end portion, corresponding to the comb tooth portion, of at least one of the two sides of the notch portion is set to be greater than zero with respect to the distance between the free end portions of the comb tooth portion.
The utility model provides a stator, includes stator core and foretell slot wedge structure suitable for concentrated winding motor, the slot wedge structure is located on stator core, and the one end of the broach portion of slot wedge structure is set up to be corresponding with stator winding's overline tip position, and the overline of each phase winding is located respectively in the corresponding interval that holds of broach portion, keeps the interval between the overline of each phase winding of tip.
An electric machine comprising a stator as described above.
By adopting the technical scheme, the slot wedge structure suitable for the concentrated winding motor is low in manufacturing cost, simple in structure and convenient to use, is provided with the comb tooth part, the comb tooth part is provided with a plurality of accommodating intervals, the comb tooth part corresponds to the overlines of the windings of the phases at the end part, the overlines of the windings of the phases are placed in the accommodating intervals of the comb tooth part, the overlines are separated, the positions of the overlines are kept, the windings of the phases are not in contact with each other, the overlines of the windings of the phases are uniformly spaced, the contact area between the overlines and air is increased, the heat dissipation effect is improved, the interphase insulation performance of the windings of the phases is further improved, and the use reliability of a product is further improved; in the process of cooling the winding by the cooling medium, the inside of the slot wedge structure can guide the cooling medium to flow to the end winding, so that the cooling medium is more fully contacted with the end winding to optimize the heat dissipation of the stator; the sparse tooth part and the slot wedge body are integrally formed, so that the structure is compact, the operation is easy, the preparation is simple, and the automatic production can be realized; the winding overline is uniformly separated by the sparse tooth part, and the appearance effect is greatly improved; the interphase insulation of the end winding has more reliable guarantee due to the uniform distance interval, and when the corresponding requirements of customers are met, the slot wedge structure can be used for properly reducing the thickness of an enameled wire insulation layer and improving the heat dissipation performance of the stator.
Drawings
FIG. 1 is a schematic structural diagram of a stator according to an embodiment of the present invention;
FIG. 2 is an enlarged view of part A of FIG. 1;
FIG. 3 is a schematic structural view of a slot wedge structure according to an embodiment of the present invention;
FIG. 4 is an angular schematic view of a slot wedge configuration according to an embodiment of the present invention;
FIG. 5 is an enlarged view of the portion B of FIG. 4;
FIG. 6 is a schematic structural view of another structure of a wedge structure according to an embodiment of the present invention;
FIG. 7 is a schematic structural view of still another structure of a wedge structure according to an embodiment of the present invention
In the figure:
1. slot wedge structure 2, stator core 3, overline
10. Spacer 11, receiving space 12, and tank interior
13. Notch part 14, curved surface structure 15 and curve structure
130. Plug-in part
Detailed Description
The utility model is further described with reference to the following figures and specific embodiments.
Fig. 1 shows a schematic structural diagram of a stator according to an embodiment of the present invention, which relates to a slot wedge structure suitable for a concentrated winding motor, a stator, and a motor, where the slot wedge structure has a comb portion, the comb portion corresponds to positions of cross-wires of windings of respective phases of the concentrated winding, and the comb portion has a plurality of accommodating intervals, and when the cross-wires are placed and accommodated, the cross-wires of the windings of respective phases at an end portion can be separated, and the positions of the cross-wires are maintained, so that the intervals between the cross-wires of the windings of respective phases at the end portion are maintained, the phase insulation performance of the windings of respective phases is improved, and the phase windings are not in contact, so that the reliability of the product is effectively improved.
A slot wedge structure suitable for concentrated winding motors is disclosed, as shown in figures 1-3, and is installed at a slot opening of a stator core 2 of a motor, when the concentrated winding is limited in the radial direction, overlines 3 of windings of all phases in the concentrated winding can be separated and are not contacted with each other, the position is kept, the distance between every two overlines 3 is kept, the phase insulation performance of the windings of all phases is improved, and the flow direction and the flow rate of an axial cooling medium are distributed in an auxiliary manner; specifically, the slot wedge structure 1 comprises a slot wedge body and a comb tooth part, wherein the comb tooth part is connected with the slot wedge body, the comb tooth part is arranged at one end of the slot wedge body, the comb tooth part is used for placing a span wire 3 and separating the span wires 3 at the end parts of the windings of all phases in the concentrated winding, the slot wedge body is used for being inserted into a slot of a stator core 2, the slot wedge structure 1 is installed at a notch of the slot of the stator core 2, and the comb tooth part is located at any end of the slot wedge body and is arranged according to actual requirements;
the comb tooth part is arranged along the direction that the slot wedge body is inserted into the slot of the stator core 2, namely, the comb tooth part is arranged along the radial direction of the stator core 2, extends from the notch position of the slot of the stator core 2 to the bottom wall direction of the slot, and is fully distributed at one end of the slot wedge body, the comb tooth part is provided with a plurality of accommodating intervals 11 for accommodating the overlines 3 of the windings of each phase at the end part, the comb tooth part is matched with the windings of the end part, the overlines 3 of the windings of each phase at the end part are respectively arranged in the corresponding accommodating intervals 11 of the comb tooth part, so that the overlines 3 are separated, the position of the overlines 3 of the windings of each phase is maintained, and further the intervals 3 of the windings of each phase at the end part are maintained, the overlines 3 are not contacted with each other, the overlines are regularly arranged, the interphase insulation performance of the windings of each phase is improved, and the reliability of the product is improved; meanwhile, the distance between the overlines 3 of the windings of each phase is kept consistent, the contact area between the wires and the air is increased, and the heat dissipation efficiency is effectively improved.
Comb tooth portion and slot wedge body fixed connection, in this embodiment, this fixed connection mode is preferred integrated into one piece, compact structure, easily preparation, and the cost of manufacture is low, can realize automated production.
The number of the comb teeth accommodating spaces 11 is plural, and is selected according to the width of the slot wedge body and the depth of the slot of the stator core 2, and is not specifically required here. The receiving space 11 has a receiving depth that enables the placement of the flying lead 3, which is set according to the size of the flying lead, and is not specifically required here.
Specifically, the comb teeth part is provided with a plurality of spacers 10, the plurality of spacers 10 are sequentially arranged along the direction in which the slot wedge body is inserted into the slot of the stator core 2, and a gap is provided between two adjacent spacers 10 to form an accommodation space 11, so that the plurality of flying leads 3 are separated and the space between the flying leads 3 of the winding of each phase at the end part is maintained; namely, the either end of the wedge body is slotted to form a containing groove body capable of containing the overline 3, and a distance is arranged between two adjacent side walls of the adjacent containing groove bodies to construct the structure of the distance piece 10. The plurality of spacers 10 are sequentially arranged along the radial direction of the stator core 2, and the plurality of spacers 10 may be arranged at equal intervals or at unequal intervals, and are selected according to actual requirements, which do not make specific requirements; the size of the gap between adjacent spacers 10 is selected according to the size of the crossover 3 of the concentrated winding and is not specifically required here. In the present embodiment, it is preferable that the plurality of spacers 10 are arranged at equal intervals.
The spacer 10 is formed by extending one end of the wedge body outward along the longitudinal direction of the wedge body, and the spacer 10 has a certain length, so that the accommodation space 11 formed by the adjacent spacers 10 has a certain accommodation depth, and the crossover 3 can be placed and accommodated. In order to facilitate the accommodation of the over-line 3, the adjacent spacer 10 forms two side walls for accommodating the space 11, the space 11 is a groove structure with both ends communicated with the outside, and the through groove structure is communicated with both ends in the axial direction of the space 11. When the spacer 10 extends, the extending direction may intersect with the length direction of the slot wedge body, or may be parallel to the length direction of the slot wedge body, and the extending direction is selected according to actual requirements, where no specific requirement is made, in this embodiment, it is preferable that the extending direction of the spacer 10 is parallel to the length direction of the slot wedge body, so that the plurality of spacers 10 are in the same plane. The plurality of spacers 10 may be arranged in parallel, that is, the accommodating spaces 11 are identical in size in the depth direction, or the plurality of spacers 10 may be arranged in an intersecting manner, that is, the accommodating spaces 11 are not identical in size in the depth direction, and the width size gradually increases or gradually decreases from the bottom wall of the accommodating space 11 to the opening direction, and is selected according to actual requirements, preferably, in the present embodiment, the plurality of spacers 10 are arranged in parallel, and the accommodating spaces 11 are identical in size in the depth direction. A plurality of spacers 10 are evenly or approximately evenly disposed at one end of the wedge body.
The spacer 10 has a cylindrical structure, and the cross-sectional shape of the spacer 10 is circular, square, oval or trapezoidal, or other shapes, which are selected according to actual requirements and are not specifically required here.
The wedge body includes a notch portion 13 and an inside 12, the inside 12 is disposed on a side of the notch portion 13, the inside 12 intersects with the notch portion 13, and the inside 12 is fixedly connected with the notch portion 13, so that the wedge body is stable in structure. When the slot wedge structure 1 is installed at the notch of the slot of the stator core 2, the slot inner portion 12 is located inside the slot of the stator core 2, the notch portion 13 is located at the notch of the slot of the stator core 2, in order to facilitate the slot inner portion 12 to be quickly and accurately inserted into the slot of the stator core 2, in the embodiment, preferably, the slot inner portion 12 and the notch portion 13 are perpendicularly intersected, and in order that the slot portion 13 can be inserted into the notch of the slot of the stator core 2, the slot inner portion 12 does not interfere with the insertion action of the slot portion 13, preferably, the slot inner portion 12 is located in the middle area position of the slot portion 13, so that the cross-sectional shape of the slot wedge body is T-shaped or approximately T-shaped.
The slot portion 13 and the slot portion 12 are both plate-shaped structures, and when the slot portion 12 is connected with the slot portion 13, the slot portion 12 is arranged along the length direction of the slot portion 13, so that when the slot portion 13 is inserted into the slot of the stator core 2, the slot portion 12 is located inside the slot of the stator core 2, and the slot portion of the stator core 2 is divided into two accommodating cavities along the length direction of the slot of the stator core 2, and a part of two adjacent coils in the concentrated winding is placed. The length of the slot interior 12 is equal to or less than the length of the slot of the stator core 2, and the width of the slot interior 12 is equal to or less than the depth of the slot of the stator core 2, in this embodiment, the length of the slot interior 12 is 3/4-1 of the depth of the slot of the stator core 2, so that the cooling medium can flow along the side faces of the two sides of the slot interior 12, respectively flow to the two ends of the stator core 2, guide the flow direction of the cooling medium, allow the cooling medium to flow through the windings at the two ends of the concentrated winding, allow the slot interior 12 to perform auxiliary distribution on the cooling medium in the axial direction, and guide the cooling medium to flow to the ends of the concentrated winding.
The length and width of the slot interior 12 are selected according to the actual length, depth and actual requirements of the slots of the stator core 2, and are not specifically required here. The length of the groove inner portion 12 and the length of the notch portion 13 may be the same, or the length of the groove inner portion 12 is greater than the length of the notch portion 13, or the length of the groove inner portion 12 is smaller than the length of the notch portion 13, and the length is selected according to actual requirements, and no specific requirement is made here.
A set of two opposite side edges are arranged along the width direction of the slot part 13, the two side edges are both provided with an inserting part 130, the thickness of the inserting part 130 is smaller than that of the slot part 13, when the slot part 13 is inserted in the slot of the stator core 2, the inserting parts 130 on the two side edges are respectively inserted into the slots on the side wall of the slot of the stator core 2, and the slot part 13 is fixedly inserted in the slot of the slot. The plug portion 130 is fixedly connected with the slot portion 13, and in this embodiment, the fixedly connecting manner is preferably integrally formed. The inserting portion 130 may be located in the middle area of the side end plane of the slot portion 13, or the inserting portion 130 is disposed next to one side of the side end plane of the slot portion 13, so that one side of the inserting portion 130 is aligned with one side of the slot portion 13, and is selected according to actual requirements, which is not specifically required here.
The comb tooth portion is disposed at one end of the slot portion 12, and the comb tooth portion and the slot portion 12 are located in the same plane, a distance from a free end portion of the comb tooth portion to an end portion of the slot portion 13 corresponding to the comb tooth portion in the slot wedge body length direction is greater than or equal to zero, and a part or all of the comb tooth portion is projected on the slot portion 13, or all of the comb tooth portion is not projected on the slot portion 13. When the distance from the free end of the comb tooth part to the end of the notch part 13 corresponding to the comb tooth part in the slot wedge body length direction is equal to zero, the end of the notch part 13 and the free end of the comb tooth part are positioned on the same plane, and at the moment, the projection of the comb tooth part on the notch part 13 is all positioned on one side surface of the notch part 13 facing the comb tooth part; when the distance from the free end of the comb tooth portion to the end of the notch portion 13 corresponding to the comb tooth portion in the slot wedge body length direction is greater than zero, at this time, the end of the notch portion 13 may be located between the root of the comb tooth portion and the free end, the projected portion of the notch portion 13 is located on one side surface of the notch portion 13 facing the comb tooth portion, and the portion not projected on the notch portion 13 projects out of the end of the notch portion 13; or, the end of the notch portion 13 is located on one side of the root of the comb tooth portion away from the free end, the comb tooth portion protrudes out of the end of the notch portion 13, and the projection of the comb tooth portion on the notch portion 13 is not located on one side of the notch portion 13 facing the comb tooth portion, in this structure case, the end of the notch portion 13 is flush with the root of the comb tooth portion, or the end of the notch portion 13 is located on one side of the root of the comb tooth portion and has a certain distance from the root of the comb tooth portion, so that the connection of the slot inner portion 12 and the comb tooth portion also protrudes out of the end of the notch portion 13; the distance in the slot wedge body length direction between the free end of the comb tooth portion and the end of the notch portion 13 corresponding to the comb tooth portion is selected according to actual requirements, and no specific requirement is made here. That is, the comb teeth may be entirely or partially protruded from the end of the slot inner 12 corresponding to the comb teeth, or the comb teeth may not be protruded from the end of the slot inner 12 corresponding to the comb teeth, and may be set according to actual requirements.
As shown in fig. 3 to 5, since the pocket portion 12 is located at the middle region of the pocket portion 13, a set of two oppositely disposed sides of the pocket portion 13 are located at two sides of the pocket portion 12, respectively, and when the end of at least one of the two sides of the pocket portion 13 corresponding to the comb tooth portion is set to have a distance greater than zero from the free end of the comb tooth portion, the end of the side of the pocket portion 13 extends in a curved line toward the free end of the spacer 10 closest to the pocket portion 13, and is recessed into the pocket portion 12; when the comb tooth part is wholly or partially protruded at the end part of the notch part 13 corresponding to the comb tooth part, the intersection point of the end part of the notch part 13 and the two side edges is connected with the free end curve of the spacing piece 10 closest to the notch part 13 to form a curve structure 15, and the curve structure 15 is sunken towards the direction of the groove inner part 12, so that the intersection point and the free end of the spacing piece 10 are in curve transition, and therefore, in the cooling process of the cooling medium, the cooling medium thrown out by the rotor flows along the transition surface of the curve structure 15, flows to the end part of the concentrated winding, is in contact with the end winding and guides the flow direction of the cooling medium; meanwhile, due to the curve structure 15, the width of the end of the slot part 13 is reduced, and the problem that the inner diameter limit value of the stator is influenced by the stress action of the position of the slot wedge caused by local bending deformation of the winding can be avoided. The shape and size of the curved structure 15 are selected according to actual requirements, and are not specifically required here.
As shown in fig. 3 and 6, one of two intersection points of the end of the notch portion 13 and the two side edges may be curved toward the free end of the spacer 10, or both of the two intersection points may be curved toward the free end of the spacer 10, and the two intersection points are selected according to actual requirements, which is not specifically required.
The distance between the spacer 10 closest to the notch portion 13 and the side of the notch portion 13 facing the groove interior 12 is equal to or greater than zero, that is, of the plurality of spacers 10 in the comb tooth portion, the spacer 10 closest to the notch portion 13 may be directly connected to the notch portion 13, or the spacer 10 closest to the notch portion 13 may be spaced from the notch portion 13 such that an accommodation space 11 is formed between the spacer 10 and the notch portion 13, and the crossover 3 is placed and accommodated. When the distance between the spacer 10 closest to the notch portion 13 and the side of the notch portion 13 facing the groove interior 12 is greater than zero, the distance is selected according to the size of the flying lead 3 and the actual requirements, and is not particularly required here.
One end of the notch part 13 corresponding to the comb tooth part extends in a curve towards the free end part of the spacer 10 closest to the notch part 13, and one side of the notch part 13 far away from the groove inner part 12 deflects towards the comb tooth part direction by an included angle C which is 15-25 degrees, and the size of the included angle C is set according to actual requirements. This contained angle C's setting can reserve out the winding buckling deformation and arouse the stator internal diameter variation that slot wedge deformation leads to, can not influence stator internal diameter limit value. One side of notch portion 13, far away from the broach portion, is the curved surface setting from the tip that corresponds with the broach portion of notch portion 13 to some planes of the other end direction, forms curved surface structure 14, and the length of this curved surface structure 14 is selected according to actual demand, and the length that curved surface structure 14 extends from this tip curved surface of notch portion 13 for this curved surface structure 14 and this side smooth transition of notch portion 13.
The curved surface structure 14 is selected according to actual requirements, and may be set or not set, as shown in fig. 6, in the slot wedge structure 1, one end portion of the slot portion 13 corresponding to the comb tooth portion is set to be flush with the root of the comb tooth portion, and at this time, the slot portion 13 is not set to be curved; as shown in fig. 7, in this slot wedge structure 1, one end portion of the notch portion 13 corresponding to the comb teeth portion is flush with the free end portion of the comb teeth portion, and at this time, the notch portion 13 is not curved.
The width of the slot interior 12 along the length direction of the slot interior 12 may be equal or unequal, and is selected according to actual requirements, which is not specifically required here. Preferably, the width of the one end of the inside 12 provided with the comb teeth is equal to or greater than the width of the other end, and the width of the inside 12 gradually decreases in the direction from the one end provided with the comb teeth to the other end.
When the comb-tooth part is arranged at one end of the slot inner part 12, a plurality of distance pieces 10 of the comb-tooth part are sequentially arranged along the width direction of the slot inner part 12, the thickness of the distance pieces 10 can be the same as or different from that of the slot inner part 12, and the distance pieces are selected according to actual requirements and do not need to be specifically required.
The utility model provides a stator, including stator core 2 and foretell slot wedge structure 1 that is applicable to concentrated winding motor, slot wedge structure 1 is located on stator core 2, when slot wedge structure 1 is installed, the one end of the broach portion of slot wedge structure 1 is set up to 3 tip positions with stator winding's overline, the overline 3 of each phase winding is located the corresponding interval 11 that holds of broach portion respectively, 3 the overline of each phase winding is separated, contactless each other, keep interval between the overline 3 of each phase winding of tip, make the interval keep unanimous between the winding overline 3, the area of contact of wire with the air has been increased, the radiating effect is improved, and simultaneously, improve the alternate insulating properties of each phase winding.
An electric machine comprises the stator.
When the slot wedge structure 1 suitable for the concentrated winding motor is used, concentrated windings are installed on a stator core 2, the slot wedge structure 1 is installed at the notch of each slot of the stator core 2, the comb tooth part of the slot wedge structure 1 corresponds to the end part, provided with the overline 3, of each phase of winding, the overline 3 of each phase of winding is respectively placed in the corresponding accommodating interval 11, the position of each overline 3 is maintained, the overlines 3 are separated and are not in contact with each other, and the interval between the overlines 3 of each phase of winding at the end part is maintained; in the use process of the motor, cooling medium is adopted for cooling, the cooling medium flows along the winding coil, the cooling medium on the slot wedge structure 1 flows along two side surfaces of the slot interior 12, the two ends of the winding flow, the cooling medium is guided to the end part of the winding, and the cooling medium is distributed and guided; meanwhile, the slot wedge structure 1 guides the cooling medium thrown out by the rotor to flow to the end part of the winding, so that the cooling medium is in contact with the end winding, and the cooling effect of the cooling medium is improved.
Similar winding structure motor, for example adopt ordinary slot wedge, its end overline because of having no interval to support, every winding looks will be squeezed each other and pasted together, and this structural form motor, every winding coil forms the series circuit, when the input voltage is 800V, every tooth is twined by 12 turns of coil, every phase contains 2 parallel branch circuits, every branch circuit is formed by 6 12 turns of coil series connections, then the potential difference between every turn of coil on every tooth equals 800/1.732/(6 x 12) approximately equals 6.4152V, and the winding looks is made the interphase insulation isolation by the slot wedge inslot, the winding is protected by the insulating paper to the stator core, therefore, this structural form motor insulation reliability mainly deals with the end winding interphase insulation.
By adopting the slot wedge structure, the end part interphase windings are uniformly spaced, the winding impregnating varnish is uniform and consistent, and the end part interphase insulation reliability is greatly improved under the multi-layer protection of uniformly spaced electrical gaps, winding paint films and impregnating varnish. Compared with motors with other structural forms, the motor with the structural form has the insulation reliability far exceeding the corresponding requirements of customers. Therefore, when the corresponding requirements of customers are met, the motor with the structure can select the enameled wire paint film with the thinner thickness according to the national standard, so that the effective copper occupation ratio in the groove is improved, and the power density of the whole motor is further improved.
By adopting the technical scheme, the slot wedge structure suitable for the concentrated winding motor is low in manufacturing cost, simple in structure and convenient to use, is provided with the comb tooth part, the comb tooth part is provided with a plurality of accommodating intervals, the comb tooth part corresponds to the overlines of the windings of the phases at the end part, the overlines of the windings of the phases are placed in the accommodating intervals of the comb tooth part, the overlines are separated, the positions of the overlines are kept, and the intervals among the overlines of the windings of the phases at the end part are kept, so that the interphase insulation performance of the windings of the phases is improved; the phase windings of each phase are not in contact with each other, so that the reliability of the product is effectively improved; the winding overline intervals are kept consistent, the contact area of the lead and air is increased, and the heat dissipation effect is effectively improved; in the process of cooling the winding by the cooling medium, the inside of the slot wedge structure can guide the cooling medium to flow to the end winding, so that the cooling medium is more fully contacted with the end winding to optimize the heat dissipation of the stator; the sparse tooth part and the slot wedge body are integrally formed, so that the structure is compact, the operation is easy, the preparation is simple, and the automatic production can be realized; the winding overline is dredged the tooth portion and is evenly divided, and the outward appearance effect promotes by a wide margin.
The embodiments of the present invention have been described in detail, but the description is only for the preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. All equivalent changes and modifications made within the scope of the present invention shall fall within the scope of the present invention.
Claims (9)
1. The utility model provides a slot wedge structure suitable for concentrated winding motor which characterized in that: the comb tooth part is connected with the slot wedge body, and the comb tooth part is arranged at one end of the slot wedge body;
the comb tooth part is arranged along the direction that the slot wedge body is inserted into the slot of the stator core, the comb tooth part is provided with a plurality of accommodating intervals and used for placing the overlines of the windings of the phases at the end part, and the comb tooth part is matched with the windings of the end part to maintain the positions of the overlines of the windings of the phases at the end part and maintain the intervals among the overlines of the windings of the phases at the end part.
2. The slot wedge structure for a concentrated winding machine according to claim 1, wherein: the comb tooth part is provided with a plurality of spacers which are sequentially arranged along the radial direction of the stator core, a gap is formed between every two adjacent spacers to form an accommodating interval, and the plurality of overlines are separated and the interval between the overlines of the windings of each phase at the end part is kept.
3. The slot wedge structure for a concentrated winding motor according to claim 2, wherein: the spacer is formed by extending one end of the wedge body outward along a length direction of the wedge body.
4. The slot wedge structure for a concentrated winding motor according to claim 2, wherein: the spacers are uniformly arranged.
5. The slot wedge structure for a concentrated winding motor according to any one of claims 2 to 4, wherein: the spacer is of a cylindrical structure.
6. The slot wedge structure for a concentrated winding motor according to any one of claims 2 to 4, wherein: the slot wedge body comprises a slot opening part and a slot inner part, the slot inner part is arranged on one side surface of the slot opening part, and the slot inner part is intersected with the slot opening part; and
the comb tooth part is arranged at one end inside the groove, the distance between the free end part of the comb tooth part and the end part corresponding to the groove opening part and the comb tooth part in the length direction of the wedge body is larger than or equal to zero, and part or all of the comb tooth part is projected on the groove opening part, or all of the comb tooth part is not projected on the groove opening part.
7. The slot wedge structure adapted for a concentrated winding machine of claim 6, wherein: the two opposite sides of the notch are respectively located at two sides of the inside of the groove, and the end of at least one side of the two sides of the notch, which corresponds to the comb tooth part, is set to be greater than zero distance from the free end of the comb tooth part.
8. A stator, characterized by: the slot wedge structure suitable for the concentrated winding motor comprises a stator core and the slot wedge structure suitable for the concentrated winding motor as claimed in any one of claims 1 to 7, wherein the slot wedge structure is arranged on the stator core, one end of a comb tooth part of the slot wedge structure is arranged to correspond to the position of the end part of a cross line of a stator winding, the cross line of each phase winding is respectively arranged in a corresponding accommodating interval of the comb tooth part, and the interval between the cross lines of each phase winding at the end part is kept.
9. An electric machine characterized by: comprising a stator according to claim 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122100550.9U CN216162494U (en) | 2021-09-01 | 2021-09-01 | Slot wedge structure, stator and motor suitable for concentrated winding motor |
Applications Claiming Priority (1)
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Address after: Free House R&D Building, No. 69, West 11th Road, Tianjin Binhai New Area Pilot Free Trade Zone (Airport Economic Zone), 300308 Patentee after: BorgWarner Powertrain (Tianjin) Co.,Ltd. Address before: 300308 Building 1, block B, No. 1, Xishi Road, pilot free trade zone (Airport Economic Zone), Binhai New Area, Tianjin Patentee before: Tianjin Songzheng Auto Parts Co.,Ltd. |